超文本标记语言下拉列表和页面列表问题
本文关键字:列表 问题 下拉列表 超文本标记语言 | 更新日期: 2023-09-27 18:11:26
我有一个小问题。我在写一个简单的rss阅读器。我有通道和项目。这是项目视图。所以我有一个SelectedChannel用户可以选择他想要看到的频道类型(因为在默认情况下他会看到所有频道中的所有项目)
`public ViewResult Index(string sortOrder, string currentFilter,
int? page, int? SelectedChannel)
{
var channels = from ch in db.Channels
orderby ch.Title
select ch;
ViewBag.SelectedChannel = new SelectList(channels, "ChannelID", "Title", SelectedChannel);
int channelID = SelectedChannel.GetValueOrDefault();
ViewBag.DateSortParm = sortOrder == "Date" ? "Date desc" : "Date";
if (Request.HttpMethod == "GET")
{
//page = 1;
}
else
{
page = 1;
}
var items = from i in db.Items
select i;
if (SelectedChannel.HasValue)
{
items = from i in db.Items
where i.ChannelID.Equals(channelID)
select i;
}
...
return View(items.ToPagedList(pageIndex, pageSize));
}`
下面是index.cshtml
中的代码 @using (Html.BeginForm())
{
<p>Select Channel: @Html.DropDownList("SelectedChannel", "All")
<input type="submit" value="Filter" /></p>
}
问题是:当用户过滤1个通道时。它的好。但不是页脚(可以有很多页)。因此,当用户试图进入下一页时,过滤器参数丢失。我看到所有项目的第二页。但我想看到selectedChannel的第二页(因为它再次成为空)。希望你能明白我的意思。谢谢你!
`<div>
Page @(Model.PageCount < Model.PageNumber ? 0 : Model.PageNumber)
of @Model.PageCount
@if (Model.HasPreviousPage)
{
@Html.ActionLink("<<", "Index", new { page = 1, sortOrder = ViewBag.CurrentSort, currentFilter=ViewBag.CurrentFilter })
@Html.Raw(" ");
@Html.ActionLink("< Prev", "Index", new { page = Model.PageNumber - 1, sortOrder = ViewBag.CurrentSort, currentFilter=ViewBag.CurrentFilter })
}
else
{
@:<<
@Html.Raw(" ");
@:< Prev
}
@if (Model.HasNextPage)
{
@Html.ActionLink("Next >", "Index", new { page = Model.PageNumber + 1, sortOrder = ViewBag.CurrentSort, currentFilter=ViewBag.CurrentFilter })
@Html.Raw(" ");
@Html.ActionLink(">>", "Index", new { page = Model.PageCount, sortOrder = ViewBag.CurrentSort, currentFilter=ViewBag.CurrentFilter })
}
else
{
@:Next >
@Html.Raw(" ")
@:>>
}
这是index.cshtml的结尾
我就是这样做的,希望有人能做到
@using (Html.BeginForm()) { <p>Select Channel: @Html.DropDownList("SelectedChannel", "All") <input type="submit" value="Filter" /></p> }
@if (Model.HasNextPage)
{
@Html.ActionLink("Next >", "Index", new { page = Model.PageNumber + 1, sortOrder = ViewBag.CurrentSort, currentFilter=ViewBag.CurrentFilter ciudad = "param-channel" }, new { id = "mylinkNext" })
@Html.Raw(" ");
@Html.ActionLink(">>", "Index", new { page = Model.PageCount, sortOrder = ViewBag.CurrentSort, currentFilter=ViewBag.CurrentFilter, ciudad = "param-channel" }, new { id = "mylinkLast" })
}
<script type="text/javascript">
$(function () {
$('#mylinkNext').click(function () {
var channel = $("#SelectedChannel").val();
this.href = this.href.replace("param-channel",encodeURIComponent(channel));
});
});
$(function () {
$('#mylinkLast').click(function () {
var channel = $("#SelectedChannel").val();
this.href = this.href.replace("param-channel",encodeURIComponent(channel));
});
});
</script>